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III/78 MK Classification Extension (Kennedy, 1983)
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MK Classification Catalogue Extension
Kennedy P.M.
<Mt Stromlo & Siding Spring Observatories, Australia (1983)>
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ADC_Keywords: MK spectral classification
Description:
The catalog provides classifications on the Morgan-Keenan (MK) system
published in the literature since the appearance of the La Plata
catalog (Jaschek et al., 1964). In addition to the MK types, the
catalog contains, for REFERENCE PURPOSES ONLY, UBV photometry, some
component identifications for multiple systems, and miscellaneous
remarks, e.g., cluster membership, although this information is not
professed to be complete. A second file of the machine version
contains the bibliographical references cited in the data file and
indicates classifications done by objective-prism techniques (OP)
or from photometric studies (PHOT).
Note that extragalactic stars (e.g. in LMC, SMC) are not included.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mkext.dat 80 35997 The Catalogue
refs.dat 80 403 The References
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See also:
III/18 : Stellar Spectra classified in the MK system (Jaschek+, 1963)
III/42 : Selected MK Spectral Types (Jaschek, 1978)
III/189 : General Catalogue of MK types (Buscombe, 1995)
Byte-by-byte Description of file: mkext.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Object identification (1)
14- 15 I2 h RAh ? Right Ascension 2000 (hours) (2)
17- 20 F4.1 min RAm ? Right Ascension 2000 (minutes) (2)
23 A1 --- DE- Declination 2000 (sign) (2)
24- 25 I2 deg DEd ? Declination 2000 (degrees) (2)
27- 28 I2 arcmin DEm ? Declination 2000 (minutes) (2)
31- 47 A17 --- SpType MK spectral type (3)
48- 50 I3 --- r_SpType [1/990] Reference number for the MK type (4)
53- 58 F6.3 mag Vmag ? V magnitude as taken from the literature.
59 A1 --- n_Vmag [V:] V if V variable, : for uncertain
60- 64 F5.3 mag B-V ? B-V color. Plus signs are omitted.
65- 70 F6.3 mag U-B ? U-B color. Plus signs are omitted.
72- 74 I3 --- r_Vmag [1/990]? Reference number for photometry.
75- 80 A6 --- Rem Remarks. (5)
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Note (1): Entries are ordered in the catalog with the following priority:
HD numbers in ascending numerical order;
HDE numbers in ascending numerical order;
DM numbers in descending zone and increasing numerical order;
Other designations use the following acronyms:
BB see Bok & Basinski, Mem. Mt. Stromlo Obs No 16, 1964
BS see Stenholm (1975A&A....39..307S)
LF5 see McCuskey and Houk, (1964AJ.....69..412M)
LFS see Smith, (1968MNRAS.138..109S)
LS I Luminous Stars in the Northern Milky Way I , cat. <III/76>
LYNGA see Ark.f.Astr., 3, No.8
MCP McCormick Proper Motion Areas - McCormick Publs 7 and 10
MS see MacConnell & Sanduleak (1970PASP...82...80M)
RWT see reference#361 (1979AJ.....84..534C),
1971AJ.....76.1099R and 1974AJ.....79.1406R
SW see reference#330 (1977A&AS...27..403S)
W see reference#301 (1976A&AS...26...31W)
WRA see reference#301 (1976A&AS...26...31W)
Note (2): the position may be very rough, or even inexistant.
Note (3): The W in Wolf-Rayet types will be found in byte 31,
as will a left parenthesis for uncertain types.
The temperature class is in byte 32, but other characters are
also there, e.g. P (peculiar), the D in Delta DEL types, etc.;
the temperature subclass is in bytes 34-36, but other
characters can be there too.
Bytes 37-43 contain luminosities, peculiarities, etc.
Note (4): Three stars have no reference for the spectral type:
HD 62318 (record#8104), HD 175253 (record#19457)
and HD 222872B (record#23441)
Note (5): Remarks can be component identification, variable-star names,
cluster membership, HDE numbers (6 digits), miscellaneous
identifications. Byte 80 contains an asterisk for stars
classified by Morgan and Keenan (1973) for the revised MK system.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- Ref [1/990]+ Reference number, as
written in columns r_SpType and r_Vmag
of the catalog
6- 29 A24 --- BibRef Bibliographic Reference
32- 72 A41 --- Auth Authors
74- 80 A7 --- Note List, or type of classification like
OP for objective-prism classification,
PHOT for photometric classification
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History:
The machine-readable MK Classification Extension Catalogue,
version 1983 was received at CDS in 1983; a first documentation was
prepared at NASA/ADC by Wayne H. Warren.
The catalogue was checked against catalogue standards at CDS in
December 1996: several misalignments, missing decimal points, etc
were corrected.
References:
Jaschek, C., Conde, H. and de Sierra, A.C. 1964, "Catalogue of
Stellar Spectra Classified in the Morgan-Keenan System",
Publ. La Plata Obs., Ser Astron. 28, No. 2. (CDS Cat. <III/18>)
Morgan, W.W. and Keenan, P.C. 1973, Annual Rev. Astron. Astrophys. 11, 29.
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(End) Francois Ochsenbein [CDS] 23-Dec-1996